Jump to content
Ultimaker Community of 3D Printing Experts

Ultimaker 1 and 1.75 filament

Recommended Posts

Posted · Ultimaker 1 and 1.75 filament

Hello experts.

Anyone of you tried to convert the Ultimaker 1 to use 1.75 filament?

I found this procedure:


It looks quite straightforward, but I'd like to ask your exeperience if someone tried to do it and if there is something specific to know.

Thanks for your help.



  • Link to post
    Share on other sites

    Posted · Ultimaker 1 and 1.75 filament

    I have a previous thread about converting the UM1 to 1.75 and its Pros and Cons. We decided the benefits of 3mm outweigh the benefits of 3mm.


  • Link to post
    Share on other sites

    • 2 weeks later...
    Posted · Ultimaker 1 and 1.75 filament

    Imho there is a simple case that favors 3mm filament over 1.75mm:


    Both 3mm (which is actually 2.85mm) and 1.75mm filaments are manufactured with +-0.05mm diameter tolerance. 1.75mm doesn't go lower than 0.05mm (I believe that is pretty much impossible anyways).


    2.85mm +-0.05mm = 1.8% diameter error tolerance

    1.75mm +-0.05mm = 2.9% diameter error tolerance

    Note that there is also +-0.1mm tolerance filament. This would make things even worse for 1.75mm filament (5.7% diameter error tolerance vs 3.5% for 3mm).

    So to me it's clear that 3mm filament should be favored over 1.75mm, because variations in filament diameter result in uneven extrusion which gets you bad prints.


  • Link to post
    Share on other sites

    Posted · Ultimaker 1 and 1.75 filament

    On the other hand, with 1.75mm you have less volume in the melting chamber, which results in better retractions. And you need a weaker feeder for 1.75.


  • Link to post
    Share on other sites

    Posted · Ultimaker 1 and 1.75 filament

    Agreed. However, for UM purposes, 3mm is far superior.


  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now

    • Our picks

      • Ultimaker showcase | April 2022 | 4pm CEST | 10am EDT
        I'm excited because I've personally produced this showcase event, so if you are curious what else I'm up to nowadays, come check it out and say hi in the chat! It would mean a lot! 
          • Thanks
          • Like
        • 4 replies
      • New here? Get ahead with a free onboarding course
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 12 replies
    • Create New...